* Remove defined CMAKE_INSTALL_PREFIX for Windows from main CMakeList.txt.
* Move footprint library path detection code from pcbnew.cpp to EDA_APP
  object.
* Add CMAKE_INSTALL_PREFIX to config.h.cmake.
* Simplify and fix search path list code.
* Add CMAKE_INSTALL_PREFIX to the list of search paths in case KiCad was
  installed using `make install`.
* Add default global footprint library table to CMake install.
* Add method to set footprint library table to PCB_BASE_FRAME object.
* Remove unused function EDA_APP::GetLibraryFile().
* Minor FP_LIB_TABLE object improvements.